My new home has half the walls in the basement as 2x3's with insulation. Basically i'm sure the walls are built like that so that they hold the insulation that's the only reason. Is there a reason for me to tear those down and use 2x4's instead? Is there a negative to leaving the 2x3 walls up and finish off the basement with matching 2x3? Or even just finish off with 2x4 anyway and keep the wall that are already done up?